Search International and National Patent Collections

1. (WO2018202432) DEVICE AND METHOD FOR OPERATING A PARTICLE SENSOR

Pub. No.:    WO/2018/202432    International Application No.:    PCT/EP2018/060083
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Fri Apr 20 01:59:59 CEST 2018
IPC: G01N 15/06
F02D 41/14
Applicants: ROBERT BOSCH GMBH
Inventors: GENTER, Simon
ROHLFING, Franziska
KREBS, Daniel
RUSANOV, Radoslav
HEEREN, Imke
TIEFENBACH, Andy
BODE, Niels
SCHITTENHELM, Henrik
Title: DEVICE AND METHOD FOR OPERATING A PARTICLE SENSOR
Abstract:
The invention relates to a device (100) for operating a particle sensor which comprises at least one high-voltage electrode (102) and at least one ground electrode (104). The device (100) has a processor (106), a measuring device (108), and a voltage supply unit (110), and an electric field (E) can be generated between the at least one high-voltage electrode (102) and the at least one ground electrode (104). The measuring device (108) is designed to measure a charge compensation current (I) which flows to the at least one high-voltage electrode (102) and/or the at least one ground electrode (104) while an exhaust gas flow flows at least partly in a region of the electric field (E) between the at least one high-voltage electrode (102) and the at least one ground electrode (104). The processor (106) is designed to actuate the voltage supply unit (110) in order to generate the electric field (E) by means of an alternating voltage (U) between the at least one high-voltage electrode (102) and the at least one ground electrode (104) at least in a period of time during the measurement of the charge compensation current (I). The invention also relates to a method for operating the particle sensor.